Covering for dandy rolls, cylindrical molds, or the like for use in paper making machines



March 7, 1939. I WEBB 2,149,649 COVERING FOR DANDY ROLLS, CYLINDRICALMOLD-S, OR

THE L-IKE FOR USE IN PAPER MAKING MACHINES Filed Aug. 16, 1935 2Sheets-Sheet l COVERING FOR DANDY ROLLS.- CYLINDRI CAL MOLDS, OR

THE LIKE FOR USE IN PAPER MAKING MACHINES Filed Aug. 16, 1955' 2Sheets-Sheet 2 March 7, 1939. N EBB 2,149,649

INVENTOR 1EI ELEDN W WEBB. W W

ATTORNEY Patented Mar. 7, 1939 Application August 16, as5,,.seri 11510.. 3 ,448

,1 5 .-=provedwoven-wire. covering therefore, the invention residing,.'particularly in the seam structure for this covering. The practiceheretofore -in:covveringc'dandy rolls, cylindrical :molds, or thelike,with wire cloth, has been to provide a. laced seam "to secure thesends-f the-wire cloth togethen'and this has not only beenunsatisfactorybecause the seam--wou1d-readily become broken, butthere-was a tendency for the wirecloth to'creep about thecylindricalstructure. It is proposed in the presp ent inventionto-provide a seam in which the ends oftthe -wire cloth are:brazed;orsoldered together,

.. and furtherto, provide a connection in the form .bftbrazed orsoldered-joints between the seam structure-and the cylindricalsupporting surface 20 of ther-roll or mold upon which the wire cloth ismounted, this connection securely holding the wire clothv againstanytendency. to creep.

{With the aboveand other objects in, view em- 'bodiments oftheinventionare. shown=in the accompanying drawings,. and theseembodiments will be hereinaftermore fully described with referencethereto, and the invention will be finally pointedout in the claim.

IInfthe drawings: q Fig. 1 is a side elevation, partially broken away,9. of afdandy roll or cylindrical mold. structure, the .wovenwirecoveringbeing broken awayto show f'thec'ylindrical supporting Wirestructure beneath itgand aportion of the cylindrical supporting wire(structure. being broken awayto ishowthe. supporting frame structurethereof.

Figfi'2 is a sectional .view along. the line 2-2 of Fig. 1.

T Fig. 3 isv an enlarged. plan :view. of theseam structure, accordingto.one embodiment of the j invention, one of the cylindricalsupportingwires being'shown in relationthereto.

Fig. 4 is a sectional view taken. alongfthe line 4-"4 of'Fig. 3.

Fig; 5 is a sectional View takenalong the. line -5-5 of Fig; 3.

Fig 6 is a-sectional' view similar to'Fig. 4,.and showing the'seamforming soldercovered wirein place between the ends 'of the wireicloth;and before'the application of heat to fuse it.

*"Figt'lis a'sectionalview of a'modified. form of the solder'coveredseam formingwire.

' Fig. 8 is a sectional-view showing the wire'illus- ""tratedin Fig. 7in its seam forming brazed.re- "lati'on to the wovenwire ends and" thecylindri- 'calsupporting wire.

Fig; 9 is a sectional view'of another modified "'form of solder coveredseam forming wire.

.Fig... 10is a sectional View showing the wire as 60 shown in 'Figl9inits seam forming relation to o h ww ven ii -r ard an th ylindr 2121907 wire.

Are 11 .24%. i simila to l .mhuwhwi the seam forming wire in a modifiedrelation, i. e., ,inyer-tedto that-shownimFigdO.

. 2 is a s ct o c x f fiu t nmad fi of. seam formingiwire. Fig. 13 isasectional view of a; still f urthermcdifiedeform.

I Fig. 14Iis. a-,sectiqna1 view showing a pa ir of seam rn new ren e etm h ihesnl of the wire cloth andsolderingwires in relation -.thereto.

Fig. 15 .is. a sectional. View, showing the seam .form-ingwiresillustrated in Fig. .l l in their seam 15 forming relationto the wovenwire endsand the cylindrical supporting wire.

, Fig; 161s. a sectional view,:of,.a modified form of g the seamformingwire. as illustratedin Fig. 14.

jEig. I'lis-a sectional iewof.,anotherinodifica- 0 ;tion, .in.whichsolder; covered wires are provided" in relation to the woven wiresends.and .the cylindrical supportinglwiretthe same being shown be- ,'.'foreapplication of heat.

Fig. 18 .isa sectional viewcfstillanother modi- 1ficationinjwhichseamforming, wires of li -shape cross-sectionare engaged with the woven wireends, the. same; being shown before the applicationof heat.

Fig. ,19 is,a.plan.,vi ew of; astill further modification or seam,particularly adapted for coarse ..weave ,-wires.

T Fig.1]20 is. a. sectional ,view .oftheseamforming wire, asemplpye'dimthe formshownin Fig. 19.

lfsimilar reference characters indicate. corresponding parts throughout'thehseveral figures of thedrawings.

Referring to ."thedrawin s and. more particularlyto' Figs. 1 and 2.,thedandyroll or cylindrical moldgstructure comprises; a. series of circularjframe, members 10 mounted upon ashaft .i i these frame members.having-longitudinally extending .bars I2. securedto their peripheries,and these bars-being. provided with aseries of grooves I3 in .rwhich isengaged the spirally woundwire i l 1. formin 1 6. l. .d ic. l suppo ur aupon which th wovenwwire. covcringris en ged and supported. In practicedandy rolls. are substan- :ztially. smallerzthan cylinder. molds, butthe -.conrestructicns 50f :the .twoare substantially similar inprinciple,"and it will :be understood that the pres- -ent' invention notonly contemplates dandy rolls and cylindrical -molds, but any othercylindrical structure;-in which; a Woven wire covering is adapted ;to bemounted upon a cylindrical sup yport.

fi'Ihe'wo-ven wire consists, of warp; wires .l5, and weft wires,l6,,interwoven therewith, and while I haveshown straight weave wire itwill be understood that other types of weaves may be employed within thescope of the invention. Referring particularly to Figs. 3 to 6 the seamis produced by means of a flat ribbon-like wire I? provided with asolder covering 18, the ends of the woven wire being ground flat and.the seam forming wire being disposed in upright relation between theseends. Heat is thereupon applied and the solder becomes fused with thewarp wire ends, as shown in Fig. 4, to thereby securely join the ends ofthe woven wire together. At the same time the solder covering connectswith the spira windin 0f the cylindrical supporting wire l4 and as theseextend entirely along the length of the seam it will be seen that anycreeping of the seam is effectually prevented. The brazed seamfurthermore provides a smooth and a more uniform surface than is thecase with the seams formed by lacing Wires.

In Figs. 7 and 8 I have shown a modification in which the seam formingwire i9 is of circular cross-section and is provided with a silversolder covering it. This wire is placed between the warp ends of thewoven wire and upon the application of heat the solder connects the warpends together and also connects the seam to the cylindrical supportingwire M.

In Fig. 9 I have shown a modification in which the seam forming wire Hhas across-sectional shape in the form of an inverted T and is coveredwith silver solder 22. In this case the upright portion of the wireengages between the warp wire ends, while the transverse portion extendsbeneath the end knuckles and rests upon the cylindrical supporting wirel l. Upon the application of heat the solder covering brazes not onlythe warp ends of the woven wire, but also connects the end knuckles withthe seam forming wire 2i and at the same time the seam forming wirebecomes brazed to the cylindrical supporting wire it. The relativelylong transverse portion 2i of the seam forming wire provides a seam ofgreat resistance against any tendency to pull apart and also provides amore extensive connec tion of the seam with the cylindrical supportingWires.

In Fig. 10 I have shown another modification in which the seam formingwire 2|, as' shown in Fig. 9, is assembled with the woven wire ends ininverted relation, that is, with the transverse portion at the outerside. 7

In Fig. 12 I have illustrated a further modification, substantiallysimilar to that shown in V Fig. 9, but in which a seam wire 23 of fiatform is covered at both sides with solder 24 and is bent upwardly in themiddle to produce a flange for engagement between the woven wire ends.

In Fig. 13 I have shown a further modification in which a seam formingwire 25,.substantially similar to that shown in Fig. 12, is providedwith silversolder 25 at one side only, and in the fold of the bent upflange there is engaged a strip 26 of silver solder; a

In Figs. 14 and 15 I have shown a modification of the invention in whicheach end of thewoven wire in encased in a seam forming wire 21 ofsubstantially horse-shoe-shape in cross-section and provided atits'inner surface with a'coating of silver solder 28. Upon theapplication of heat the solder coating brazes the'wires 27 about thewarp wire ends as shown in Fig. l5. At the same time the warp wire endsare secured together by placing silver solder wires 29 and 30 betweenthe ends and which upon the application of heat 7 comprises a wire 3! ofhorse-shoe-shape in crosssection provided at its inner side with asilver solder coating 32 and at its outer side with a silver soldercoating 33. In this case the solder coating 32'will connect the wire tothe warp wire ends and the solder coating 33 will connect it to the seamforming wires at the two ends of the wire cloth together. i

In Fig.1? I have. illustrated a modification in which the seam isproduced by a seam forming wire 34 having a silver solder coating 35,this wire being placedin the recess formed'between the abutting ends ofthe woven wire, a seam' forming wire 36 also provided with a silversolder coating 3'! being placed in the recess at the under side of theends'of the wovenwire'and in contact with the cylindrical supportingwire I l. Upon the application of heat the solder coats will cause thetwo ends of the woven wire to be brazed to-. gether and at the sametimethe seam structure will be connected to the cylindrical supporting wireIt by brazed joints. 7

In Fig. 18 I haveillustrated another modification in which the two endsof the woven wire are embraced by U-shaped silver solder strips 38, afiat wire 39 being disposed between the bases of these strips and theends of the warp wires. Upon the application of heat the solder stripsconnect together the two wires 39 and connect also the ends of the warpwires to'the wires 39 to form the seam. At the same time the seam issoldered to the cylindrical supporting wire 14.

In Figs. 19 and 20 I have illustrated a still further modificationparticularly adapted for coarse weave wires. In this case the weft wireends are in staggered relation and the wires of one end are disposedbetween the passages of the warp wires of the other end. The seamforming wire consists of a flat strip'fl provided with a solder coveringll and which is given a substantially serpentine shape corresponding'tothe space formed about the warp ends of the woven wire, this soldercovered wire being placed in this space about the warp wire ends asclearly shown in Fig. 19. Upon the application of'heat the wire 20 formsa brazed connection between the warp wire ends and at the same time thecylindrical supporting wire 14 is brazed to the seam.

I have illustrated and described preferred and satisfactory embodimentsof the invention, but it will be obvious that changes may be madetherein," within the spirit and scope thereof, as

defined in the appended claim. 7

Having thus described my invention what I claim and desire to secure byLetters Patent is: a

In a dandy roll, cylindricaljmold, or the like, a cylindrical wiresupporting surface, a woven wire covering therefor,'comprising a lengthof woven wire fabric, having its ends disposed in opposed relation alonga line parallel to the axis of said supporting surface andcircumferentially butted and joined by fusion with a solder stripdisposed between said opposed ends andalso engaged and fused withsaidsupporting surface, the seam formed thereby being entirely below thecylindrical surface of said covering fabric and constituting a commonconnection between the opposed ends of said fabric and between saidcovering and said supporting surface.

NELSON -W. WEBB.

